Composite pipe.



ATENTED OCT. 22, 1907.

. SUN.

E PIPE.

T1011 Hum 3011.13.1905.

2 SHEETS--SHEET 1.

Work with plastic compound, such as cement, concreto,

informi: A1.com JOHNSON, 0F ALLSTON, MASSACHUSETTS.

COMPOSITE PIPE Specification of Letters .Patent Patented Oct. 22, 1907.

Application tiled November 13,1905. Serial No- 287,199.

To all whom it 'may concern:

lie it known that I, EUGENE MALCOLM JOHNSON, a citizen of the UnitedStates, residing at Allston, in the county oi Suffolk and State oflllassachusetts, have invented certain new and useful Improvements inComposite Pipe, of which the following is a specification,

reference being had therein to the aecompanying'drawing.

lhe object of my invention is to produce composite pipe of sheet metaland plastic material.

Figure l is a perspective view of a pipe constructed in accordance withmy invention and partially'covered on its outside with concrete or thelike, and provided with an interior lining ot'lconerete or the like.Fi'g. 2 is a perspective View of the foregoing, and shows a'pipecoupling' located in and projecting from one end of the pipe. Fig. 3 isa transverse section of a completed pipe section corresponding to line3-3 of Fig. 1. Fig.'4 is o. lengthwise central section 'of a pair ofcompleted pipe Sections united together by means of a coupling such asindicated in Fig. 2..y Fig. shows a modification in which a reduced endol the metal portion of one pipe section is sockoted in the end of theconnected pipe section. v

In the drawings, l and `2 are complementary, sheet mclalpipe-sections,each hemisphcrical in cross-section and having flat integral ribs 2along 'their two sides. The pipe sections have holes 3 through them andintegral, projecting ears 4. The ribs 2* are smooth -snriaeed and formedwith holes 5 for rivets, or the like.`

When a pair oi pipe sections are placed, concave side towards concaveSide, and the opposed faces of the ribs brought together, the ribs areSecured together by fas# toners 6, and a strongr sheet metal, pi pc-likeframe work produced.4 It is necessary, however, to line thisframegranolitlxic, or the like, before the pipe-sections are assembled,as shown in Fig. 2. Herein, the lining 7 has its edges 8 flush with thefaces of the ribs 2; the plastic lining is anchored in place by passingthrough the holes (as indicated at 7") at which points it unites withthe outer covering E) which completely` incloses thc lissemlilcd pipesei-tions. W lion the ribs arclirought lace to face, the edges are alsobrought into contact. '.lhe abutting edges 8, 8 are united, ii thclining is still moist; il dry, by applying proper moist.composition tothe edges.- In either of these ways, a liquid or gastightjointisformedai thcjunction oi the edges 8, 8,and homogeneity given lo the lining.The projections give additional anchorage to the lining over what theholes afford; and the lined shells or sections may be transportedWithout the linings getting loose.

It is desirable to forni the cud margins of the pipe sections withoutprojections and Awithout holes and to connect the pipe sections.together end-wise by lap jointing. *il* l -In Fig: l it will be seenthat theV end of lining 7 stops short toi the end of the pipe section,so that theend of the pipe section is unllined 'annularly at 11. A con``venient Way of uniting two pipe sections is to i/risert a lined ring 20into the free and unlned end 11 of a. pipe section. The ring 20 may bemade of two half-round` members of metal as indicated in Fig'. 2. Thecoupling 20'Vprojeets from the end of the pipe Ysection into which it isinserted, and is adapted to receive the unlined end of a pipe section tobe connected, as will be plain.V

without further description. The lining of coupler 2Q butt-joints ateachend' of the coupler with the thereto opposed ends of the linings of thepipe sections coupled together, and the'opposed walls of therespcctivs'liningsl are homogeneously united by moistening them ory b ythe'use of a cement. The theoretical joints are in dicatcd by 12 in Fig.4.

In Fig. 5, showing e. modification, the coupler Ulis'.

dispensed with, and the reduced end 21 oi one ol the pipe sections istelescopically mounted in the end of Athe 'pipe section coupled thereto.In this case v the lining of the pipe sectionvhaving the'reduced end 21cornes flush with the outer end ofthe section,.the inner surface oftheouter pipe section being formed with'the unlined space 1l as in Fig.-1.Hom'ogneous jointsare formed at 12?-12 in this construction, thesejoints being theoretical and not existentfin this colnpleted pipel afterthe plastic material has hardened.

Ribs 2 may be of any proper size, and in` effect are ears, whichpreorsbly entend the whole length 'of each hemispherical pipesectionvat' cachgedge thereof, as

shown. I hereinafter refer to these ribs or earsas edge v What Iclaimis: 4

A sheet nictnl vplpeYi'ormlne; frame comprising homispnerlenl Sectionsech formed with outwardly-projectini; edge ears which are fastenedtogether to hold said sections pipe-wise; the plpe sections being formedwith parallel rows of perforatlons at` euch of.' two opposltefsldes otwhich there is nu outwardly projecting, integral, our; combined wlth nuinterior lining ,and-nn exterior covering, vbotltlfof plnstlc material,which is united together through said perfor-allons; said lining having:iengtlmvlse edges jointed together opposite the odge cnrs of Suidframe,und the slds edges of the eoverlng of euch member helng supportedfon snid edire ears and hy said Anrojcetlng ears at opposite sides ofthe perfor-ations.

In testimony whereof l nflx my signature ln presence of two wltncsses.Y,

EUGENE MALCOLM JOHNSON. Witnesses:

1B. A. ALLEN, EnwAsu S. BEACH.

